下列说法中正确的是（） A．饱和蒸汽的压强随体积的增大而_爱下问搜题

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下列说法中正确的是（　　）

A．饱和蒸汽的压强随体积的增大而增大

B．气体分子的速率分布呈现“两头少，中间多”的规律

C．“用油膜法估测分子的大小”实验中油酸分子直径等于油酸酒精溶液体积除以相应油酸膜的面积

D．一定质量的理想气体从外界吸收热量，其内能可能不变

答案

BD

完形填空

Eighty-year-old retired tailor, James McKay, spent Saturday night in jail after      thirty-year-old Keith Smith over the head      his walking stick. McKay's wife, Laurence told us that while McKay is usually a        person, he had been        to this act of violence by getting wet just once too often.
Smith lives above the McKays and it appears that not only is he a keen gardener, he is also a        collector. Unfortunately for him, the water he sent over his balcony every day ended up on the McKay's, or too often, on the McKays       .
“For the last fortnight, since Smith moved into the flat above us, we have hardly dared to go to our       ,” said Laurence. She added that it wasn't so much the water falling onto their balcony from Smith watering his plant        bothered them, it was more the way he cleaned his fish tanks. “We'd be        there happily reading our newspapers, when        so much water would come from above that we'd be as wet as if we'd        with our clothes on! Neither could we get rid of the        of fish!”
And on Saturday evening it was just too       . “It was James's birthday,” explained Laurence, “and I'd made him a birthday cake. The candles were a great sight as you can imagine, but James didn't get to blow them out.”       , Smith emptied one of his larger tanks over his balcony and both the McKays and the cake were wet       . Rarely had Laurence seen McKay move so fast. “I couldn't        him. He was up there in a flash. It was the fastest I'd seen him move since 1964.”
Smith is not going to take things further with the police. He has also promised to change his        from now on. And what of James McKay?        he left the police station, a large crowd of supporters sang him, “Happy Birthday”. “      the most exciting birthday       !” said the cheerful old man. “The best since my adolescence I'd say!”

B．unconsciously

D．Consequently

问答题

给定资料中提供以下数据： ①2003年人均私人捐款：中国0.92元人民币，美国828.7美元；当年中国和美国的人均收入之比为1:38，而人均慈善捐款之比为1:7300。 ②2003年美国167个慈善组织网上筹集9亿多美元，网上捐款数额同比增长了150％。请针对以上数据，依据给定资料三，进行归纳性述要，并结合自己所知道的事例，说出影响个人捐助的社会因素。要求：表述准确，层次分明，引例恰当；字数掌握在400字左右。